Sean Parker and Austin Hillebrecht made this video, and it's too good not to share this very instant. Also, Sean is currently in an airport on the way to a film festival in LA, so he can't upload it this very instant. But it needs to be.
There was an honest misunderstanding in this video. During my conversation with Sean, I mentioned Plural-Eyes-like functionality is in the works for GStreamer. But the video makes it seem the feature is already complete in GStreamer and in Novacut, which is not the case. Sean and Austin were tired, give em a break.
Also, turns out I was mistaken and the Plural-Eyes-like functionality is actually internal in PiTiVi, not a GStreamer plugin.